JP5352440B2 - Maintenance management system, maintenance management method, and maintenance management program - Google Patents

Description

  The present invention relates to a maintenance management system, a maintenance management method, and a maintenance management program, and more particularly to a technique for outputting instructions for efficiently performing maintenance on facilities installed in a vast area.

  As the demand for electric power has been slowing down, the improvement in reliability brought about by the increase in the amount of equipment per area composed of linked line sections cannot be expected, and interest in maintenance management has increased. Various technologies have been proposed for improving the efficiency of maintenance, but maintenance is roughly classified into two types: post-mortem maintenance and preventive maintenance.

  Post maintenance is maintenance performed to restore equipment to an operational state after a failure occurs.

  On the other hand, in preventive maintenance, maintenance work is triggered by a change in the state of the equipment. However, when preventive maintenance is performed on equipment (for example, power distribution equipment or power transmission equipment) installed from several kilometer squares to several hundred kilometer square meters, maintenance is performed every time a state change occurs in equipment that is geographically separated. As a result, the number of moving man-hours becomes large, which hinders operations.

  In Patent Document 1, in order to improve the efficiency of preventive maintenance in such a wide area facility, it is anticipated that a change in the state of the facility is expected, and the number of movement man-hours is reduced by scheduling the movement in maintenance.

Japanese Patent Application No. 2008-129016

  In Patent Document 1, maintenance is planned for each line section of a distribution main line (high voltage line) or a single facility. However, in actual power utilities, due to the rationality of work, the area is divided into small areas called management zones, and maintenance work is carried out in units of management zones (for example, Research Institute of Energy) "New Power Network System Demonstration Experiment Comprehensive Survey Progress Report on New Power Network Technology" (March 2006), page 1-61). In addition, the area of the management zone is not limited to the line section in which the high-voltage distribution lines are separated by switches, but also the transformer to low voltage, the low-voltage distribution lines, utility poles, iron poles, the trunk and branch lines of the high-voltage distribution lines, etc. Various facilities are installed.

  In other words, since maintenance work is performed in units of management wards, there is a problem that it is difficult to perform maintenance work because it is difficult to assign personnel, etc., in the maintenance schedule for each line ward or facility.

  In view of the above circumstances, an object of the present invention is to provide a maintenance management system, a maintenance management method, and a maintenance management program capable of efficiently performing maintenance.

  In order to achieve the above object, a maintenance management system according to the present invention includes a management zone data recording means for recording data including position coordinate data of a management zone and time data regarding maintenance of the management zone with respect to the management zone divided into regions. Similarity calculation means for calculating the degree of similarity between management wards, maintenance management ward calculation means for calculating a maintenance management ward that is a group from which management wards with similarities are extracted, and maintenance in units of maintenance management wards Maintenance instruction output means for outputting instructions.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to implement | achieve the maintenance management system, the maintenance management method, and maintenance management program which can maintain efficiently also with respect to the equipment managed for every management zone of an area. .

It is a block diagram which shows the structural example of the hardware of the cyclic maintenance management system concerning embodiment of this invention. It is a block diagram which shows the structure of the plan execution management apparatus of 1st embodiment. It is a flowchart which shows the process of the cyclic maintenance management system S by the plan execution management apparatus of 1st embodiment. It is a data flow figure which shows the transfer relationship of the process of the cyclic maintenance management system of the plan execution management apparatus of 1st embodiment. It is a flowchart which shows the detail of a process of link reliability calculation (step 31). It is a flowchart which shows the detail of a process of wear state transition management (step 32). It is a flowchart which shows the detail of a process of maintenance time limit calculation (step 33). It is a flowchart which shows the detail of the process of constraint management (step 34) and the process of cyclic maintenance determination (step 35). It is a figure for demonstrating linkage reliability calculation (step 31). It is a figure which shows one example of a degradation transition model. It is a figure which shows the example of the division | segmentation centering on a substation. It is a figure which shows the result evaluated with the frequency | count of repairing the broken equipment as maintenance after the maintenance results. (a) is the figure which showed the frequency | count of the weekly repair work at the time of performing the cyclic maintenance of this embodiment, (b) is the frequency | count of the weekly repair work by the regular maintenance of the conventional comparative example. FIG. It is a flowchart which shows the detail of the process of restrictions management (step 34) and the process of cyclic maintenance determination (step 35) in 2nd embodiment, and a maintenance instruction | indication output. In the second embodiment, a regional management zone is illustrated. The maintenance management area obtained by the process of division into maintenance management areas (step 1404) in the second embodiment is illustrated. The maintenance management area obtained by performing the adjustment by the processing of the maintenance management area adjustment (step 1405) in the second embodiment is illustrated.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<< First Embodiment of the Invention >>
First, a first embodiment of the present invention will be described.

<< Overview of Plan Execution Management Device 1 >>
FIG. 1 is a block diagram showing a hardware configuration example of the cyclic maintenance management system S according to the first embodiment of the present invention. The embodiment of the present invention is applied to a cyclic maintenance management system S (see FIG. 1) of a plan execution management apparatus 1 that drafts a work plan for maintenance of power distribution facilities. FIG. 4 is a data flow diagram showing a data transfer relationship of processing of the cyclic maintenance management system of the plan execution management apparatus 1.

  The processing of the plan execution management device 1 shown in FIG. 1 is a target value of the probability that each line section B21, B31, B41, B51,... (See FIG. 1) of the distribution facility is not broken, as shown in FIG. Linkage reliability calculation (step 31) for calculating the target soundness level, wear state transition management (step 32) for managing the transition of the wear state of the distribution equipment line section, and calculation of the maintenance deadline for the distribution equipment line section Maintenance deadline calculation (step 33), constraint management (step 34) for managing the standard time of maintenance work, travel time between work places, and the like, and finally a work plan is made using the processing results of these functions A cyclic maintenance decision (step 35).

  With this configuration, when making a maintenance work plan for the distribution facility, a maintenance deadline is set using the structure and reliability of each line section B21, B31, B41, B51,... In addition, the maintenance work plan is made in consideration of the maintenance work time, the travel time between work places, and the like, thereby improving the efficiency of the maintenance work of the distribution equipment.

  In addition, although embodiment of this invention demonstrates the installation arrange | positioned in a wide area as electric power distribution equipment, this invention is not limited to this.

<< Overall configuration of patrol maintenance management system S >>
The cyclic maintenance management system S shown in FIG. 1 includes a plan execution management device 1 that performs a process for creating a maintenance plan for a distribution facility, a distribution remote monitoring device 2 that monitors the state of the distribution facility, and a distribution facility installed outside. Are provided with a communication network 3 for communicating with facilities and devices such as the switches 21, 31, 41, 51, 61,. Here, the plan execution management device 1 and the power distribution remote monitoring device 2 are arranged in a wide area, for example, a sales office installed in several cities in a prefecture or a sales office installed in one large city. ing. Hereinafter, the configuration of each part of the cyclic maintenance management system S will be described in detail.

<Distribution remote monitoring device 2>
The power distribution remote monitoring device 2 shown in FIG. 1 recognizes the state of the switches 21, 31, 41, 51, 61,... (Indicated by triangles in FIG. 1), etc. Is a device that monitors the energization state of each of the line sections B21, B31, B41, B51,.

  For example, when a power failure occurs, the distribution automation system temporarily turns off the switches 21, 31,... And then turns on the switches 21, 31,. 2 is used to recognize which line section B21, B31,... Has a fault such as a ground fault or disconnection.

  One line section has a distance of about 200 m to about 500 m, for example, and distributes power to about 60 general customers via a transformer.

<Communication network 3, mobile terminals 4a, 4b, etc.>
The communication network 3 is a communication network such as the Internet, and portable terminals 4a, 4b, etc., such as PDAs (Personal Digital Assistants), etc., where maintenance personnel of power facilities perform input / output locally, and substations 20, 30, 40, 50,... Plays a role of information communication connection.

  The maintenance staff inputs the deterioration state of the outgoing line sections 21, B31,... Using the mobile terminals 10, 11,..., And the input data is input to the plan execution management apparatus 1 via the communication network 3. It is transmitted and used for the processing of the cyclic maintenance management system S by the plan execution management apparatus 1.

  The communication network 3 may be connected to a WAN (Wide Area Network), a dedicated line, or the like, and is not limited.

<Power distribution configuration>
As shown in FIG. 1, distribution lines L <b> 2 to L <b> 6,... Are drawn out from the substations 20, 30, 40, 50,.

  Distribution lines constituting distribution line paths L2 to L6 are electrically connected by switches 21 to 23, 31 to 33, 41 to 43, 51 to 53, 61 to 63, and between switches 21 to 23,. Are referred to as line sections B21, B31,.

  Thereby, the switches 21 to 23, 31 to 33, 41 to 43, 51 to 53, 61 to 63 are closed to electrically connect the respective line sections B21, B31,. It is comprised so that electrical cutting may be performed by opening. For example, the switches 21 to 23,... At both ends of the line section are not applied to the line sections B21, B31,. It is possible to open, i.e. to disconnect the electrical connection.

  In addition to the switches 21 to 23,..., Connection switches 34 and 54 (indicated by the squares in FIG. 1) for connecting the distribution lines are installed on the distribution line L2 to L6.

  The contact switches 34 and 54 are normally open, that is, electrically disconnected, but are closed during an accident such as a power outage to supply power to the load-side healthy section across the distribution line. It can be carried out.

  For example, in FIG. 1, when an accident such as a ground fault occurs in the line B52 under the jurisdiction of the substation 50, or if there is no contact switch 54, the line B53, B54 ahead of the line B52 Distribution stops, but by providing the contact switch 54, when the accident occurs in the line B52, by closing the contact switch 54, from the line B64 across the distribution line, the line B54, Power can be supplied to B53. Thereby, it is possible to limit the power outage in the minimum line section.

  Moreover, the information regarding the switching states of these switches 21 to 23,... And the communication switches 34 and 54 and the accident states of the distribution lines B21, B31,... Are transmitted to the network 3 via the substation. It is transmitted to the connected power distribution remote monitoring device 2, the plan execution management device 1, and the like.

<< Plan execution management device 1 >>
FIG. 2 is a block diagram showing the configuration of the plan execution management apparatus 1.

  The plan execution management device 1 is, for example, a server, a CPU (Central Processing Unit) 10, a main memory 11 that is a main storage device, and a storage that stores a cyclic maintenance management system program that operates the cyclic maintenance management system S. The apparatus 12 includes a keyboard, a display device, and an input / output interface 13 such as an external communication terminal connected to the communication network 3 shown in FIG. 1, and these components are connected by a bus b or the like. Yes.

  The storage device 12 is configured by an HDD (Hard Disk Drive) or the like, and as shown in FIG. 2, the target reliability of a management unit consisting of a single or a plurality of facilities such as line sections B21, B31,... (See FIG. 1). Associative reliability calculation unit 14 that calculates the degree of soundness of the facility to which the degree is given, wear state transition management unit 15 that provides the transition structure of the wear state of the facility, and the reliability of each important point and section satisfies the target level Maintenance deadline calculation unit 16 for calculating the deadline for maintenance work to be performed, constraint management unit 17 for capturing and recording the restrictions on the transfer of on-site personnel and the amount of work and work that can be received, A cyclic maintenance management system program for realizing the functions of the cyclic maintenance determining unit 18 for calculating a cyclic schedule for instructing the seconding is stored.

  When operating the cyclic maintenance management system S, the CPU 10 implements each function by reading the program from the storage device 12 into the main memory 11 and executing the program.

  The functions of 14, 15, 16, 17, and 18 described above may be realized by hardware. The program for realizing the above-described functions may be transferred from a storage medium such as a CD-ROM (Compact Disk Read Only Memory), or may be downloaded from another device via the network 3.

<< Maintenance work related to the cyclic maintenance management system S by the plan execution management device 1 >>
Next, maintenance work related to the cyclic maintenance management system S will be described.

  The maintenance activities are diverse and mainly include preventive maintenance, failure response, and maintenance management. The outline is as follows.

  The first preventive maintenance is an activity for confirming that a power distribution system in operation is operating correctly, foreseeing or discovering a failure and a sign leading to the failure, and taking necessary measures. This includes inspections and periodic replacements.

  The inspection is an activity to investigate the state of each device of the distribution facility. For example, the human senses are used to discover situations that may interfere with the distribution lines, such as the crossing and proximity of trees, buildings, and other structures near the distribution lines. Or, using an electrical measuring instrument, optical instrument or tool, for example, regarding the foundation, investigate the condition of the concrete ground, deformation deformation of the member, the degree of rusting of the member or bolt, loosening of the bolt, ground resistance, Investigate corrosion, damage, discharge traces, and other abnormalities with respect to electric wires, and investigate abnormalities such as cracks, loose installation, and deformation of overhead wire fittings with respect to insulators.

  The second failure response is an activity to restore the system to a healthy state by finding the failed part, replacing and repairing the failed part when a failure occurs in the operating system. Recovery corresponds to this. In addition to this, it may include activities such as investigation of the cause of failure and countermeasures for failure.

  The third maintenance management is to secure resources such as personnel and equipment for appropriately and efficiently implementing the first preventive maintenance and the second failure response, and to manage the records of the work performed. .

  In this embodiment, as part of maintenance management, in order to secure resources for implementing preventive maintenance and failure handling, the equipment status and personnel status are ascertained through various monitoring means, and appropriate and efficient activity planning and Management is performed.

<< Processing by the plan execution management apparatus 1 of the cyclic maintenance management system S >>
Next, the processing of the cyclic maintenance management system S will be described with reference to FIGS. FIG. 3 is a flowchart showing the processing of the cyclic maintenance management system S by the plan execution management apparatus 1.

  FIG. 4 shows the main data transfer relationship related to the processing of the plan execution management apparatus 1 shown in FIG.

  As shown in FIG. 3 and FIG. 4, the processing of the cyclic maintenance management system S by the plan execution management apparatus 1 is performed by setting the target soundness level that the line segments B21, B22,. Linkage reliability calculation (step 31) obtained from the target reliability {r (i)} for each of the sections B21, B22,..., The data N of the system linkage structure and the data Z indicating the switching states of the switches 21 to 23,. Have. The soundness level is a frequency that represents the probability that a certain facility has not failed, and the target soundness level is a target value of the soundness level. In addition, the reliability is a frequency that represents the probability of energization of the service that the facility should perform, and the target reliability is a target value of reliability.

  Further, the processing of the cyclic maintenance management system S by the plan execution management apparatus 1 relates to the wear state transition management (step 32) that gives the wear state transition structure (see FIG. 10) of the line segment B21 of the equipment, and maintenance work. Maintenance deadline calculation (step 33) for calculating a deadline, constraint management (step 34) for mainly recording constraints related to field personnel, and cyclic maintenance decision (step 35) for calculating a cyclic schedule for maintenance are provided.

  Here, the processing of the linkage reliability calculation (step 31), the wear state transition management (step 32), the maintenance deadline calculation (step 33), the constraint management (step 34), and the cyclic maintenance determination (step 35) has been described above. As shown in FIG. 2, the associated reliability calculation unit 14, the wear state transition management unit 15, the maintenance period calculation unit 16, the constraint management unit 17, and the cyclic maintenance determination unit 18 stored in the storage device 12 shown in FIG. It is done by executing.

  Hereinafter, the details of the process of the plan execution management apparatus 1 will be described.

<< Association Reliability Calculation (Step 31) (see FIGS. 3 and 4) >>
Next, the association reliability calculation (step 31) shown in FIGS. 3 and 4 will be described with reference to FIG. FIG. 5 is a flowchart showing details of the process of calculating the association reliability (step 31) shown in FIG.

  The process of calculating the association reliability (step 31) is a process performed by executing the program of the corresponding association reliability calculation unit 14 by the plan execution management apparatus 1 shown in FIG.

  When the process is started, first, from the power distribution remote monitoring device 2 shown in FIG. 1, a graph representing the connection branch structure of the line sections B21, B22,. ON / OFF of the switches 21 to 23 of the section sandwiching the line information B21, B22,... (The presence / absence of a fault in the line section is known from the OFF state) is acquired (step 401 in FIG. 5). Further, the target reliability {r (i)} for each of the N line segments B21, B22,... Is input by the maintenance personnel to obtain the reliability {r (i)} (step 402 in FIG. 5). ). Note that i is a serial number for identifying each of the line sections B21, B22,.

The reliability {r (i)} may be input through the input / output interface 13 shown in FIG. 2 as described above, or data input in advance is stored in the storage device 12 (see FIG. 2). It may be read from the storage device 12 at the time of processing.
Subsequently, a target soundness level a ′ is calculated (step 403 in FIG. 5). The soundness a is a frequency representing the probability that the equipment in a certain line section has not failed. Even if the equipment in a certain line section itself has not failed, energization is achieved by the failure of the equipment on the power supply side to be connected. There are times when you can't. For example, in FIG. 1, line segment B53 is a case where energization cannot be achieved due to failure of line segment B52 on the power supply side to be connected even if it is not broken. The target soundness level a ′ is literally the target value of the soundness level a. Step 403 in FIG. 5 is performed as follows.

  For a certain line section, for example, the line section B53 shown in FIG. 9, the line sections B51, B52,... Partitioned by the switches 51,. The paths that can be reached by connecting are enumerated with reference to the aforementioned system linkage structure data N and switch state data Z. For example, “B51 → B52 → B53” (path 1) and “B61 → B62 → B63 → B64 → B54 → B53” (path 2) are listed for the line section B53. Then, using the variable a (i) representing the soundness of the line segment B51,..., An expression of reliability of the line segment B53 by the enumerated path is obtained. FIG. 9 is a diagram for explaining the association reliability calculation (step 31).

For example, as shown in FIG.
Reliability r of path 1 (B51 → B52 → B53) = a (B51) × a (B52) × a (B53)
And
Reliability r of pass 2 (B61 → B62 → B63 → B64 → B54 → B53) = a (B61) × a (B62) × a (B63) × a (B64) × a (B54) × a (B53))
It is.

  The target soundness a ′ (i) of the line segment i on the enumerated path is updated so that the reliability of the enumerated path becomes equal to or higher than the line area reliability target value r (B53) ^.

In the above example, since the supply to the B53 is performed by the path 1 or the path 2, the reliability r (B53) of the line section B53 is the probability that both paths do not cause a failure at the same time r (B53). = {1- (1-r (B51 → B52)) × (1-r (B61 → B62 → B63 → B64 → B54)} × a (B53)
It is. That is, the multiplication value of the failure degree opposite to the reliability of the path 1 (excluding B53) and the failure degree opposite to the reliability of the path 2 (excluding B53) is subtracted from 1, and the path 1 and path 2 (B53 is The reliability r (B53) of B53 is obtained by multiplying the reliability values of the path 1 and path 2 by the soundness level a (B53) of the line section B53.

Assuming that the soundness a (B51) to a (B64) of each line section has a certain value a, the path 1 to the line section B53 has two line sections B51 and 52 as shown in FIG. since, the health of the path 1 is ^{a 2,} whereas, the path 2 to the line section B53, so track section B61, B62, B63, B64, five B54 but there, health of the path 2, a ⁵ .

Therefore, the soundness a ² pass 1 as well as subtracted from 1, the soundness a ⁵ pass 2 is subtracted from 1, at least one of these multiplication values of the subtraction value (path 1 or path 2 fails The reliability of the path 1 and the path 2 that reach the line B53 is obtained by subtracting the probability of the current path) from 1. The reliability r (B53) of the line segment B53 is obtained by multiplying this value by the soundness level a of the line segment B53 itself. That is, the reliability r (B53) of the line section B53 is expressed by the following equation.

r (B53) = {1- (1-a ² ) (1-a ⁵ )} × a (1)
Then, the lower limit of a satisfying the target reliability r (B53) ^ of r (B53) is obtained from the equation (1), and this is obtained from the line i on the path (B51, B52, B61, B62, B63, B64, B54, B53) are updated as the value of the target soundness level a ′ (i). However, rewriting is not performed when the predetermined soundness level a is larger than the target soundness level a ′.

  By repeating the above processing for all the line sections, the target soundness level a ′ (i) of the line section is obtained. Note that i is a variable representing each line section.

Here, when the target soundness level a ′ (j) is given to the specific line section j or when the actual soundness level is observed, these values are set as the target soundness level a ′ ( The initial value of i) may be given. (Step 403 in FIG. 5)
Subsequently, the target soundness level a ′ (i) of the line segment obtained by repeated calculation is output for all the line segments. (Step 404 in FIG. 5)
The above is the processing for calculating the association reliability (step 31) (see FIGS. 3 and 4).

<< Wearing State Transition Management (Step 32) (See FIGS. 3 and 4) >>
Next, the process of wear state transition management (step 32) shown in FIGS. 3 and 4 will be described with reference to FIG. FIG. 6 is a flowchart showing details of the process of wear state transition management (step 32).

  In the process of wear state transition management (step 32), the degradation transition model shown in FIG. 10 is managed for each line segment i. FIG. 10 is a diagram illustrating an example of the deterioration transition model.

  As shown in FIG. 10, the equipment in the line sections B21, B22,... Has a multi-stage transition state from the initial D1 state to the slight failure D2 state and the heavy deterioration D3 state until the actual failure F occurs. It is in the state of. For example, if the line consists of facilities that cause salt damage along the sea, the washed state (initial D1), the state where salt has started to adhere to the insulator (slightly deteriorated D2), the state where the salt has started to crystallize in the insulator A short circuit accident (fault F) occurs through (severe deterioration D3). In another example, in the mountains, the surrounding felled state (initial D1), the branch approached (slightly degraded D2), the state where some branches were on the distribution line (heavy degraded D3), The state of the short circuit accident (fault F) due to the branch straddling the electric wire is changed.

  Hereinafter, the wear state transition management (step 32) shown in FIGS. 3 and 4 will be described according to FIG. 6 with reference to FIG.

  First, in step 501 of FIG. 6, based on the results of inspections and repairs carried out in the previous planned execution period, the state of the line segment, that is, the initial D1 state, the slightly deteriorated D2 state, the severely deteriorated D3 state, the failure Set F. For the line sections that have not been inspected, the state distribution obtained in the previous plan execution period, that is, the distribution of which deterioration state shown in FIG. 10 is taken is copied.

  Subsequently, in step 502 of FIG. 6, an aging process is performed. By multiplying the state transition probability obtained statistically, that is, the probability that the degradation state represented by the values q1 to q3 shown in FIG. 10 proceeds, the state distribution pre_m (i) in the previous period is The state distribution m (i) of deterioration in is obtained.

  Subsequently, in step 503 of FIG. 6, the wear state transition structure which is the deterioration transition model shown in FIG. 10 is output for each line section.

  The above is the process of wear state transition management (step 32) (see FIGS. 3 and 4).

  In this example, the case where the wear state of the equipment is classified into a plurality of stages of initial D1, slight deterioration D2, heavy deterioration D3, and failure F is illustrated. However, the wear state of the equipment may be classified according to continuous values. .

<< Conservation deadline calculation (step 33) (see FIGS. 3 and 4) >>
Next, the maintenance deadline calculation (step 33) shown in FIGS. 3 and 4 will be described with reference to FIG. FIG. 7 is a flowchart showing details of the maintenance deadline calculation (step 33).

First, the target soundness level for each line section obtained in the above-described link reliability calculation (step 31) (see FIG. 5) {
a ′ (i)} (step 601 in FIG. 7) and the wear state transition structure shown in FIG. 10 for each line section obtained in the wear state transition management (step 32) (see FIG. 6) Data W (i, m, q) representing the state distribution m (i) of deterioration at the end of the period and the state transition probability is acquired. Note that i in the data W (i, m, q) is a number indicating each line segment, and m indicates a deterioration state of the line segment i. Q in the data W (i, m, q) is a sequence of transition probabilities of the line segment i. For example, in FIG. 10, when the state of the line segment is in the slightly degraded state D2, the state of heavy degradation D3 probability q ₂ to be the 80% probability is 10% at present maintain, inspect and repair the results, 80% of such probability 10% made the initial state D1, 10%, a row of 10% of the transition probabilities corresponding . (Step 602 in FIG. 7)
Subsequently, for all the line sections i, the probability that the line section i reaches the state of the failure F (see FIG. 10), that is, the probability that the line section i is not healthy is obtained from W, and this is the target failure rate (1-a '(I)) are compared (step 603 in FIG. 7).

  If it is determined in step 603 in FIG. 7 that the line j has a higher probability of failure than the target failure rate (1-a ′ (i)) (Yes in step 603 in FIG. 7). The maintenance time limit t (j) ^ is calculated as follows. (A) Lines are arranged in descending order of failure probability and assigned a maintenance deadline for those with a variance of deterioration state smaller than a predetermined value. (A) List line segments having a wide distribution of deterioration states (that is, line segments that have not been inspected for a predetermined period) and assign maintenance deadlines in the order of the line segment numbers. (Step 604).

  On the other hand, if it is determined in step 603 in FIG. 7 that the line segment j has a probability of reaching a failure below the target failure rate (No in step 603 in FIG. 7), the processing is terminated as it is.

  The above is the processing of the maintenance period calculation (step 33) (see FIGS. 3 and 4).

<Deformation of Wear State Transition Management (Step 32) and Maintenance Period Calculation (Step 33)>
Instead of the wear state transition management (step 32) (see FIG. 6) and the maintenance period calculation (step 33) (see FIG. 7), the following may be performed.

  The wear state transition management (step 32) obtains the deteriorated state distribution m (i) _0 at the end of the current period from the state distribution pre_m (i) in the previous period, and further uses the state transition probability to determine the first and second periods. The deterioration state distribution m (i) _k up to k periods ahead, for example, a period corresponding to 10 years is obtained and output as a deterioration state distribution column {m (i) _k}.

In the processing of the maintenance deadline calculation (step 33), the failure probability in each period, that is, the state of “failure F” shown in FIG. 10 is taken out from the deterioration state distribution time series {m (i) _k}. By obtaining the ratio, the time series {F (i) _k} of the failure probability is obtained for each line segment i. This is compared with the failure rate (1-a ′ (i)), and a time point k0 on the failure probability time series {F (i) _k} not exceeding this is obtained. To do. Note that a ′ (i) is the target soundness level of the section i as described above.
<< Constraint management (step 34) and cyclic maintenance decision (step 35) (see FIGS. 3 and 4) >>
Next, constraint management (step 34) and cyclic maintenance determination (step 35) shown in FIGS. 3 and 4 will be described with reference to FIG.

  FIG. 8 is a flowchart showing details of the constraint management (step 34) process and the cyclic maintenance decision (step 35) process.

  First, in the constraint management (step 34), the standard time s (j) for maintenance work statistically obtained from the length, topography, type of equipment and quantity of a certain line section j, and the previous line The standard travel time d (i, j) required for moving from the ward i to the line ward j is stored as table data, and the travel time d (i, j) increases maintenance time due to bad weather, or the road is divided due to a disaster. After performing the correction process for increasing the travel time by, output in response to the call. In addition, the business office which is the starting point of maintenance is converted into data as a special line section 0. Preferably, the constraint management (step 34) records the maintenance deadline, the movement of personnel for maintenance, and the amount of work that can be accepted in a constraint database (not shown) stored in the storage device 12 shown in FIG. And keep updating. (Step 701 in FIG. 8).

  In the subsequent cyclic maintenance decision (step 35), the area is divided according to the number of business days, for example, the number of 20 days, in the period corresponding to the plan execution in which the maintenance area is divided by the following method. Preferably, as shown in FIG. 11, a dividing line is drawn around the substation 50 so that the total amount of work Σs (j) (j is a line section included in a certain region) in one region is equal. Draw a dividing line.

  In addition, FIG. 11 is a figure which shows the example of the division | segmentation centering on the substation 50, and the line section is shown with the painting circle as a node.

In FIG. 11, the work related to other substations is also equalized, and the distribution area of the substation 50 is divided into four (for four business days). (Step 702 in FIG. 8)
Subsequently, a maintenance deadline representative of the divided areas is obtained, and thereby ranking of each area is performed by the following method. First, out of the maintenance deadlines of the line sections B21, B22,... Included in the area, the one with the most immediate maintenance deadline is set as the representative maintenance deadline for the entire area. Next, the order of maintenance for the areas is assigned in the order in which the representative maintenance deadlines are imminent. For example, in FIG. 11, the area with the maintenance deadline of 2008.6.20 has the highest priority and becomes the representative maintenance deadline for this whole area. (Step 703 in FIG. 8).

Finally, maintenance during the period is assigned as one area per day in order of area priority. The daily maintenance circuit assigns the total travel distance to the shortest. (Step 704 in FIG. 8)
Instead of steps 702 to 704 in FIG. 8, maintenance circuits may be set in the order in which the maintenance deadlines are imminent. This method is particularly effective when there are a plurality of line sections that have imminent maintenance deadlines across a plurality of regions.

  In this way, the work plan {U (k)} shown in FIG. 4 is drawn up.

  The maintenance deadline recorded in the constraint database by constraint management (step 34), the movement of personnel for maintenance, and the amount of work that can be accepted are appropriately used for the processing in steps 702 to 704 in FIG. A suitable fine work plan {U (k)} can be drawn up.

  The above is the processing of constraint management (step 34) and cyclic maintenance determination (step 35) (see FIGS. 3 and 4).

<< Action and effect >>
Next, the effect of this embodiment is demonstrated with reference to FIG. 12, FIG.

  FIG. 12 is a diagram illustrating a result of evaluation based on the number of times repairing a broken facility with post-maintenance as a maintenance result.

  As shown in FIG. 12, the number of repairs during the quarter of the conventional comparative example was about 150 times, but according to the embodiment, it was reduced to about 140 times.

  This is explained as the following phenomenon. In the regular maintenance of the conventional comparative example, uniform regular replacement is performed, which is the cause of increasing the number of repair works. This is due to the fact that maintenance is carried out even for the line areas where there is little need for uniform periodic replacement.

  On the other hand, according to the present embodiment, the interval until the maintenance is performed for the line section having a reliability higher than the specified value, that is, the necessity for maintenance is less than the conventional regular maintenance. Since the effect of stretching is also obtained, the total number of maintenance is reduced. This can reduce the cost of repair.

  FIG. 13A is a diagram showing the number of weekly repair works when the cyclic maintenance of the present embodiment is performed, and FIG. 13B is a diagram showing the number of weekly repairs according to the conventional comparative example. It is a figure which shows the frequency | count of repair construction. Comparing FIG. 13 (a) and FIG. 13 (b), according to FIG. 13 (a) showing this embodiment, it can be seen that the number of constructions per week is leveled to be almost the same.

  This is because the maintenance deadline is set from the target soundness level in the maintenance deadline calculation (step 33) shown in FIGS. 3 and 4, and the daily maintenance is set in the cyclic maintenance decision (step 35) shown in FIGS. By setting the route, the subsequent repair work due to the occurrence of an unexpected failure is reduced by setting the maintenance deadline from the target soundness level and performing maintenance, and systematic inspection and replacement of maintenance is performed. This is due to what has happened.

<< Second Embodiment of the Invention >>
Next, a cyclic maintenance management system according to the second embodiment of the maintenance management system of the present invention will be described. This embodiment is different from the constraint management (step 34) and the cyclic maintenance decision (step 35) in FIGS. 2 and 3 described in the first embodiment. Note that the configuration, function, processing procedure, etc. of the cyclic maintenance management system in the present embodiment are the same as those in the first embodiment with respect to the parts that are not particularly shown as modified examples.

<< Constraint Management (Step 34) and Cyclic Maintenance Decision (Step 35) in the Second Embodiment (see FIGS. 3 and 4) >>
Next, details of the processing of the constraint management (step 34) and the processing of cyclic maintenance determination (step 35) of this embodiment will be described with reference to FIG. FIG. 14 is a flowchart showing details of constraint management (step 34) processing and cyclic maintenance determination (step 35) processing, and maintenance instruction output.

  In step 1401, a predetermined number of representative districts are selected from the regional management districts. The representative area is selected according to a random number so that the geographical position is not biased. As a more preferable selection method, a vector [geographical location, maintenance date], which is a combination of the location of the management area and the maintenance date, is selected so as not to be biased. In this embodiment, the most immediate maintenance deadline of the equipment in the management zone is set as the maintenance deadline of the management zone.

  In step 1402, the similarity between each management ward and each representative ward is calculated. The similarity is the distance on the position plane between each management zone and each representative zone, or the vector [geographical location, maintenance deadline] representing each representative zone and the vector [geographical location, maintenance deadline] of each management zone. It is good also as distance. Alternatively, the coordinates of the central point of a representative ward A are (x1, y1) and the maintenance deadline is t1, the coordinates of the central point of a certain management ward P is (u1, v1) and the maintenance deadline is r1. In some cases, the similarity d (A, P) between the representative ward A and the management ward P may be expressed by Equation 1. Here, the constant k is an adjustment constant that determines whether the similarity is calculated with emphasis on the positional gap between A and P or the temporal gap.

  Alternatively, the similarity may be a weighted square sum of “travel time between each representative ward and each management ward” and “difference between maintenance deadlines between each representative ward and each management ward”. This is particularly suitable when the geographical distance between the representative ward and the management ward is expressed as a movement time, and the terrain is close to the straight distance but there is no road.

  It should be noted that data such as the location of the management zone and the maintenance deadline used in steps 1401 and 1402 are recorded in the management zone vader base 1400A.

  Step 1403 is a process for correcting the maintenance deadline of the management area database. From the power distribution remote monitoring device 2 or the portable terminals 4a, 4b,..., Whether the management area is affected by stormy weather, lightning, typhoon, tree contact with the equipment, or salt damage to the equipment. Detects from the input data, and performs a process to advance the maintenance deadline of the management area in the affected area. In addition, a process for advancing or extending the maintenance deadline is performed based on the inspection result of the progress of the equipment failure in another management area of the same environment.

  In step 1404, the process of dividing into maintenance management zones is performed. The management ward is registered in the maintenance management ward related to the representative ward having the highest similarity (for example, the representative ward having the closest distance when the similarity is taken as the distance). The maintenance management area is a collection of a plurality of management areas. By registering all the management zones in the maintenance management zone related to one of the representative zones, the area can be divided into the maintenance management zones. The management area and the maintenance management area will be described with reference to FIGS. 15 and 16.

  FIG. 15 illustrates a regional management zone. Within each management area, there are various facilities such as line sections where high-voltage distribution lines are separated by switches, transformers to low voltage, low-voltage distribution lines, utility poles, steel poles, main and branch sections of high-voltage distribution lines. is set up. In this embodiment, the length of one side of the management area is 400 meters. The length of one side of the management area is, for example, the Metropolitan Police Department Traffic Department Director (Tatsuda Kou (Ko. 2.3) No. 170 December 17, 1960) It may be an appropriate value within 500 meters, which is defined as “divided”. In this embodiment, the area is 1600 km square meters (one side of the area is 40 km), and there are 10,000 management zones in the area. The management areas colored in the management area in the figure are representative areas. The number written in the representative area shown in the figure is the maintenance deadline. The maintenance time limit is set by, for example, the maintenance time calculation unit 16 in FIG.

  FIG. 16 illustrates the maintenance management zone obtained by the process of dividing into maintenance management zones (step 1404).

  In step 1405, the process of adjusting the range of each maintenance management area is performed. Standard time of maintenance work in the maintenance management zone (standard time is obtained statistically from the length, topography, type and quantity of equipment in the management zone) and worker travel time (road information Dividing maintenance management areas and combining with other maintenance management areas so that the total maintenance time is equal to the sum of the movement times from the original management area to another management area) Is being processed. Instead of this embodiment, a process for dividing a large maintenance management area and a process for combining a small maintenance management area with other maintenance management areas so that the number of management areas included in one maintenance management area is uniform. You may make it perform. This processing is based on the step of displaying, for the input / output interface 13, the number of management zones of each maintenance management zone and the total maintenance time for the maintenance management zone, receiving the instruction input for dividing the maintenance management zone, and the instruction. This is realized by dividing the maintenance management area, redisplaying the number of each management area and the total maintenance time, and combining the designated maintenance management areas. It is also possible to automate the instruction input for dividing the maintenance management area and rejoining. In this case, the number of management zones in the maintenance management zone or the total maintenance time that is larger than the average value is extracted, and the corresponding maintenance management zone is set to a predetermined position (for example, a management zone with a close maintenance deadline with the adjacent maintenance management zone). Divide the maintenance management zone from the location of the surrounding area. On the other hand, the number of management zones without maintenance management zones or those having a total maintenance time smaller than the average value are extracted, and are combined based on the smallest of the adjacent maintenance management zones or the closest maintenance deadline.

  The data of the maintenance management area used in steps 1404 and 1405 is stored in the maintenance management area database 1400B. The standard time for maintenance work and the movement time of workers are stored in the work restriction database 1400C.

  FIG. 17 illustrates the maintenance management zone obtained by performing the adjustment in the maintenance management zone adjustment (step 1405).

  Note that the processing from step 1401 to step 1405 may be executed every predetermined period (for example, once a year). This makes it possible to review the maintenance management zone in accordance with the current situation even after making a long-term plan that spans multiple periods.

  In this embodiment, the maintenance management area obtained in this way is to be worked for a predetermined period (for example, year, half year, month, week, day), and is output as a maintenance instruction (step) 1406). This is the work plan {U (k)} shown in FIG.

  Note that the number of representative wards selected in step 1401 is set based on the number of average management wards that should be maintained during a predetermined period divided by the number of all management wards. As a result, the average number of management zones included in the maintenance management zone matches the number of management zones to be maintained in a predetermined period. In another embodiment, in consideration of facilitating the range adjustment of the maintenance management zone by combining the maintenance management zones in step 1405, the number of representative zones selected in step 1401 is maintained during a predetermined period. The number of power average management zones may be based on a number (for example, twice the number) larger than the number obtained by dividing the number of all management zones.

<< Summary >>
A cyclic maintenance management system for a plan execution management apparatus that instructs maintenance of facilities arranged in a wide area includes an associated reliability calculation means for calculating a target reliability of a plurality of facilities that are single or mutually related, and a facility Wear state transition management means for providing a transition structure of wear state, maintenance deadline calculation means for calculating a deadline for maintenance work to satisfy the target level of reliability of each important point and section, maintenance personnel And a restriction management unit that captures and records the transfer work amount / acceptable amount of work amount, and a cyclic maintenance determination unit that calculates a cyclic schedule instructing the transfer to the maintenance target.

  (1) Preferably, the association reliability calculation means sets the reliability or soundness as a target of the equipment, at least the data related to the connection relationship with other equipment, or the reliability or soundness of other equipment. It is determined from any one or more of the data.

  Here, the soundness level is a frequency related to the probability that a certain facility has not failed, and the reliability is a frequency related to the probability that a service (for example, energization) to be performed by the facility can be achieved.

  In addition, even if a certain facility itself is not broken, there is a case where the service cannot be performed due to a failure of the associated facility.

  By such means, it is possible to set an appropriate reliability or soundness level for equipment connected to equipment that requires high reliability or soundness.

  (2) Preferably, the wear state transition management means classifies the wear state according to a plurality of stages or continuous values, and includes, as data, the frequency of probability regarding each stage from another stage, preferably a maintenance interval value. And the above-mentioned probability frequency.

  In particular, preferably, the degree of certainty of moving from one stage of wear to another is based on the data or experience of the same type of equipment or other equipment installed under the same weather and topographic conditions as the equipment. Calculation is based on the data entered by the person who owns it.

  By such means, it is possible to appropriately determine the soundness of the equipment including equipment that cannot be constantly monitored. This is because the data regarding the state of the equipment is only the data at the time of inspection. For equipment that cannot always be monitored, the state between inspections can be handled appropriately only by treating it as having a probability value.

  (3) Preferably, the maintenance deadline calculating means is connected to the associated reliability management means and the wear state management means, and determines a maintenance deadline for each equipment that satisfies the target reliability or soundness of the equipment. To.

  (4) Preferably, the constraint management means continues to record and update the maintenance deadline, the movement of personnel for maintenance, and the amount of work that can be accepted in the constraint database.

  (5) Preferably, the cyclic maintenance determining means divides the equipment into a predetermined number of sets based on at least information relating to position, and ranks the sets based on representative values of maintenance deadlines in each set. Then, the maintenance circuit is determined so that the maintenance is performed from the set having a higher rank.

  With this configuration, it is possible to perform efficient maintenance with reduced travel costs.

  By providing such a cyclic maintenance management system for the plan execution management device, with regard to the maintenance of facilities located in a wide area, restrictions related to the maintenance of the functions of the grid system consisting of mutually related facilities, the movement of maintenance personnel, Maintenance management that realizes maintenance that satisfies the restrictions on work acceptance can be performed.

  Therefore, it is possible to obtain detailed and efficient instructions for equipment arranged in a wide area in consideration of the state of wear and connection of equipment, the movement time of personnel, and the amount of work. .

  In the embodiment of the present invention, the maintenance management area is a work plan and a maintenance instruction is used, so that maintenance activities for the management area can be efficiently performed.

  In the present embodiment, the case where the present invention is applied to power facilities has been described as an example. However, facilities other than power facilities that require cyclic maintenance management, for example, power facilities such as water supply, sewerage, gas, communication lines, railway facilities, etc. The present invention can also be applied widely and effectively.

DESCRIPTION OF SYMBOLS 1 Plan execution management apparatus 2 Power distribution remote monitoring apparatus 3 Communication network 14 Linkage reliability calculation part (linkage reliability calculation means)
15 Wear state transition management unit (wear state transition management means)
16 Maintenance deadline calculation department (maintenance deadline calculation means)
17 Constraint Manager (Constraint Manager)
18 Cyclic maintenance decision section (cyclical maintenance decision means)
21-23, 31-33, 41-43, 51-53, 61-63 Switch (equipment)
34, 54 Contact switch (equipment)
Step 31 Linkage reliability calculation (linkage reliability calculation process, link reliability calculation procedure)
Step 32 Wear State Transition Management (Wear State Transition Management Process, Wear State Transition Management Procedure)
Step 33 Maintenance date calculation (maintenance date calculation process, maintenance date calculation procedure)
Step 34 Constraint Management (Constraint Management Process, Constraint Management Procedure)
Step 35 Cyclic maintenance decision (cyclic maintenance decision process, cyclic maintenance decision procedure)
a (i) Soundness
a '(i) Target soundness level B21 to B23 Line (facilities)
B31-B34 Line (Equipment)
B41-B43 Line (Equipment)
B51-B54 Line (Equipment)
B61-B64 Line (Equipment)
D1 Initial (multiple stages of wear)
D2 Slight degradation (several stages of wear)
D3 Heavy degradation (multiple stages of wear)
F Failure (multiple stages of wear)
L2-L6 Distribution line (equipment)
q _{1 to} q ₃ probability qi _{1 to} qi ₃ probability qs _{1 to} qs ₃ probability {r (i)} target reliability

Claims (5)

In the maintenance management system that instructs the maintenance of equipment located in the area,
Management zone data recording means for recording data including position coordinate data of the plurality of management zones and time data relating to maintenance of the management zones, for a plurality of management zones divided into regions,
A maintenance management zone calculation means for determining a predetermined number of representative zones which are management zones selected so that the geographical position is not biased;
For each management ward , similarity calculation means for calculating the similarity between the predetermined number of representative wards based on the proximity of the position coordinates and the proximity of the maintenance deadline ;
Maintenance instruction output means for outputting a maintenance instruction in units of maintenance management areas that are groups of management areas from which management areas with similarities are extracted;
The maintenance management system is characterized in that the maintenance management zone calculation means combines each management zone with the representative zone having the highest similarity, and calculates the maintenance management zone by the combination . Before Kiho all Management District calculating means,
Characterized in that it comprises using any one or more of workload value to the value or management district Management District number of maintenance management wards preservation Management District adjusting means for calculating the division or set union conservation Management District The maintenance management system according to claim 1 . Before Kiho all management system, as a conservation period correction means,
Concerning the maintenance of the management area in the severe environment where the management area is one of the affected areas of stormy weather, lightning, typhoon, tree contact with equipment, salt damage to equipment, etc. Severe environment correction means for performing processing for reducing time data, or correction means for increasing or decreasing time data related to maintenance from the progress speed of equipment failure in a management zone of an environment equivalent to the severe environment ,
Maintenance management system according to claim 1 or 2, characterized in that it comprises. In the maintenance management method that instructs the maintenance of the equipment arranged in the area,
A selection step in which the maintenance management zone calculation means selects a predetermined number of management zones selected so that the geographical position is not biased from a plurality of management zones as a representative zone;
Similarity calculation means, for each management ward, a similarity calculation step of calculating the similarity between the predetermined number of representative wards based on the proximity of position coordinates and the maintenance deadline;
The maintenance management ward calculating means combines each management ward with the representative ward having the highest similarity, and calculates a maintenance management ward that is a group of management wards from which the management wards with similarities are extracted by the combination. Management zone calculation step,
Maintenance management method conservation instruction output means, characterized in that it comprises, and maintenance instructions performing maintenance instruction the preservation Management District as a unit. A maintenance management program for causing a computer to execute the maintenance management method according to claim 4 .

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